From patchwork Tue Jun 14 17:44:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ashok Raj Nagarajan X-Patchwork-Id: 9176355 X-Patchwork-Delegate: johannes@sipsolutions.net Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DC85A6021C for ; Tue, 14 Jun 2016 17:44:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CF5392823D for ; Tue, 14 Jun 2016 17:44:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BEB4B282ED; Tue, 14 Jun 2016 17:44:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2BFBC2823D for ; Tue, 14 Jun 2016 17:44:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932087AbcFNRoy (ORCPT ); Tue, 14 Jun 2016 13:44:54 -0400 Received: from wolverine02.qualcomm.com ([199.106.114.251]:36699 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752028AbcFNRox (ORCPT ); Tue, 14 Jun 2016 13:44:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=qti.qualcomm.com; i=@qti.qualcomm.com; q=dns/txt; s=qcdkim; t=1465926293; x=1497462293; h=from:to:cc:subject:date:message-id:mime-version; bh=toecXMQQog/2R4cTYgBtsiCJiM0YGAGf4DK4LlNSgLY=; b=H9k/pVckqEZZHl8jdHBTIFBFS/BZU6weYJZ771VD6cMS8w4spqe+ehnF f2Gqu+vwMcEOVtxQFMmePCLS+8zNpl86HbKmKaBbC7b02mAb6rXM2i3GT QaSmehse6n3DHf0Oc6Bhm2pj+mjeZNLmpp6UAy8ksIzbJtgmPp77b7AlS I=; X-IronPort-AV: E=Sophos;i="5.26,471,1459839600"; d="scan'208";a="295641350" Received: from unknown (HELO Ironmsg04-L.qualcomm.com) ([10.53.140.111]) by wolverine02.qualcomm.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 14 Jun 2016 10:44:52 -0700 X-IronPort-AV: E=McAfee;i="5700,7163,8196"; a="1143563507" Received: from nasanexm02g.na.qualcomm.com ([10.85.0.88]) by Ironmsg04-L.qualcomm.com with ESMTP/TLS/RC4-SHA; 14 Jun 2016 10:44:52 -0700 Received: from aphydexm01f.ap.qualcomm.com (10.252.127.15) by nasanexm02g.na.qualcomm.com (10.85.0.88) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Tue, 14 Jun 2016 10:44:51 -0700 Received: from qcmail1.qualcomm.com (10.80.80.8) by aphydexm01f.ap.qualcomm.com (10.252.127.15) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Tue, 14 Jun 2016 23:14:42 +0530 Received: by qcmail1.qualcomm.com (sSMTP sendmail emulation); Tue, 14 Jun 2016 23:14:18 +0530 From: Ashok Raj Nagarajan To: CC: , , , Ashok Raj Nagarajan Subject: [PATCH 1/2] cfg80211: Add support to set tx power for a station associated Date: Tue, 14 Jun 2016 23:14:16 +0530 Message-ID: <1465926256-6463-1-git-send-email-arnagara@qti.qualcomm.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: NASANEXM01B.na.qualcomm.com (10.85.0.82) To aphydexm01f.ap.qualcomm.com (10.252.127.15) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support to set transmit power setting type and transmit power level attributes to NL80211_CMD_SET_STATION in order to facilitate adjusting the transmit power level of a station associated to the AP. The added attributes allow selection of automatic and limited transmit power level, with the level defined in mBm format. Signed-off-by: Ashok Raj Nagarajan --- include/net/cfg80211.h | 5 ++++ include/uapi/linux/nl80211.h | 12 ++++++++++ net/wireless/nl80211.c | 54 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 71 insertions(+) diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 6392167..4bf761d 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -797,6 +797,10 @@ enum station_parameters_apply_mask { * @opmode_notif: operating mode field from Operating Mode Notification * @opmode_notif_used: information if operating mode field is used * @support_p2p_ps: information if station supports P2P PS mechanism + * @txpwr: tx power (in mBm) to be used for sending data traffic. If tx power + * is not provided, the default per-interface tx power setting will be + * overriding. Driver should be picking up the lowest tx power, either tx + * power per-interface or per-station. */ struct station_parameters { const u8 *supported_rates; @@ -823,6 +827,7 @@ struct station_parameters { u8 opmode_notif; bool opmode_notif_used; int support_p2p_ps; + unsigned int txpwr; }; /** diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h index e23d786..fe28006 100644 --- a/include/uapi/linux/nl80211.h +++ b/include/uapi/linux/nl80211.h @@ -1819,6 +1819,15 @@ enum nl80211_commands { * * @NL80211_ATTR_PAD: attribute used for padding for 64-bit alignment * + * @NL80211_ATTR_STA_TX_POWER_SETTING: Transmit power setting type (u32) for + * station associated with the AP. See &enum nl80211_tx_power_setting for + * possible values. + * @NL80211_ATTR_STA_TX_POWER: Transmit power level (u32) in mBm units. This + * allows to set Tx power for a station. If this attribute is not included, + * the default per-interface tx power setting will be overriding. Driver + * should be picking up the lowest tx power, either tx power per-interface + * or per-station. + * * @NUM_NL80211_ATTR: total number of nl80211_attrs available * @NL80211_ATTR_MAX: highest attribute number currently defined * @__NL80211_ATTR_AFTER_LAST: internal use @@ -2201,6 +2210,9 @@ enum nl80211_attrs { NL80211_ATTR_PAD, + NL80211_ATTR_STA_TX_POWER_SETTING, + NL80211_ATTR_STA_TX_POWER, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index d759901..0ef7377 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -257,6 +257,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_STA_SUPPORTED_RATES] = { .type = NLA_BINARY, .len = NL80211_MAX_SUPP_RATES }, [NL80211_ATTR_STA_PLINK_ACTION] = { .type = NLA_U8 }, + [NL80211_ATTR_STA_TX_POWER_SETTING] = { .type = NLA_U32 }, + [NL80211_ATTR_STA_TX_POWER] = { .type = NLA_U32 }, [NL80211_ATTR_STA_VLAN] = { .type = NLA_U32 }, [NL80211_ATTR_MNTR_FLAGS] = { /* NLA_NESTED can't be empty */ }, [NL80211_ATTR_MESH_ID] = { .type = NLA_BINARY, @@ -4380,6 +4382,32 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) params.local_pm = pm; } + if (info->attrs[NL80211_ATTR_STA_TX_POWER_SETTING]) { + enum nl80211_tx_power_setting type; + int idx; + + if (!rdev->ops->set_tx_power) + return -EOPNOTSUPP; + + idx = NL80211_ATTR_STA_TX_POWER_SETTING; + type = nla_get_u32(info->attrs[idx]); + + if (!info->attrs[NL80211_ATTR_STA_TX_POWER] && + (type != NL80211_TX_POWER_AUTOMATIC)) + return -EINVAL; + + if (type != NL80211_TX_POWER_AUTOMATIC) { + if (type == NL80211_TX_POWER_LIMITED) { + idx = NL80211_ATTR_STA_TX_POWER; + params.txpwr = nla_get_u32(info->attrs[idx]); + } else { + return -EINVAL; + } + } else { + params.txpwr = 0; + } + } + /* Include parameters for TDLS peer (will check later) */ err = nl80211_set_station_tdls(info, ¶ms); if (err) @@ -4507,6 +4535,32 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) return -EINVAL; } + if (info->attrs[NL80211_ATTR_STA_TX_POWER_SETTING]) { + enum nl80211_tx_power_setting type; + int idx; + + if (!rdev->ops->set_tx_power) + return -EOPNOTSUPP; + + idx = NL80211_ATTR_STA_TX_POWER_SETTING; + type = nla_get_u32(info->attrs[idx]); + + if (!info->attrs[NL80211_ATTR_STA_TX_POWER] && + (type != NL80211_TX_POWER_AUTOMATIC)) + return -EINVAL; + + if (type != NL80211_TX_POWER_AUTOMATIC) { + if (type == NL80211_TX_POWER_LIMITED) { + idx = NL80211_ATTR_STA_TX_POWER; + params.txpwr = nla_get_u32(info->attrs[idx]); + } else { + return -EINVAL; + } + } else { + params.txpwr = 0; + } + } + err = nl80211_parse_sta_channel_info(info, ¶ms); if (err) return err;